Golf stick



L. H. BRINKMAN Dec; 20, 1927.

GOLF STICK inal Filed June 24. 1924 INVENTOR.

/ ATTORNEY Patented Dec. 20, 1927.

UNITED STATES I 1,653,428 PATENT OFFICE.

LOUIS H. BRINKMAN, OF GLEN RIDGE, NEW JERSEY."

GOLF STICK.

Original application filed .Tune 24, 1924, Serial No. 721,965. Dividedand this application flled October 31,

- 1925. Serial No. 65,918.

This invention relates to tubular metal shafts for golf sticks.

This applicatioin is a division of my application Serial No. 721,965filed June 24, 1924.

Metal tubes form light, durable and strong shafts for golf clubs butheretofore such shafts have been of tubes of a uniformly taperingdiameter and have not had the balance, flexibility at desired pointsetcQ, all of which are summed up in the term feel of the club.

It is the main object of the present invention to provide tubular metalshafts for golf clubs which shall have the desired f l This isaccomplished by suitably varying the taper of the tube diameter and thethickness of the tube wall may be made such, either uniform or' varyingin thickness at different points, as will contribute to the desiredresults. The desired feel varies with different users but the shaft mostoften filling the desired requirements is one .in which f the tube is ofreversed taper in tube diam.-

eter and having uniform thickness of wall, and such construction'istherefore my preferred form.

- Other and ancillary objects of the invention will appear hereinafter.

-In the accompanying illustrate the invention Fig. 1 is a side elevationof a shaft for a golf club;

Fig. 2 is a view showing theshaft in sec- ;ion;

Fig. 3is a view of a modified form of golf club showing the shaft inlongitudinal section;

Fig. 4 is a view of a modified form of club showing the shaft inlongitudinal section; and I Fig. 5 is a view of another modified form ofgolf club, the shaft being shownin longitudinal section.

In Figs. 1 and 2 the golf shaft shown is of a seamless steel tubinghaving substan tially uniform thickness of wall throughout and having auniform taper throughout the greater partof its length but having ashort section" at its end of uniform. diameter.

- Thus the part 56 is of uniform taper of tube 1 diameter and, extendsfor the greater portion of the length of the shaft. to the point Glandthence to the end is the section 57 of drawings which 1 uniform diameter(the whole shaft being of unlform thickness of wall) adapted to recelvethe shank 63 of the head 64 of a golf 'club, the two being securedtogether in any out the greater part of its length to a point of minimumdiameter 79 and thence tapering oppositely or reversely through asection 80 to a point 81 and thence being of cyclindrical section 82 tothe end' of the shaft.

In Fig. 4 is shown a shaftv having a tapered tube of uniform thicknessof wall for the section 65 which extends for the greater portion of itslength and terminating at the narrowest portion 66 and thence having thesection 67 of uniform internal diameter but of increasing externaldiameter (the tube increasing in thickness) to a point 68 whence thetube shaft extends with uniform thickness of wall and uniform diameterof tube to its end. It is to be observed in connection with the shaftsof Figs. 3 and 4. that the points 66 and 79 are those of the leastoutside diameters of the tube, the shafts being of greater outsidediameters upon both sides of those points. This affords a means fordecreasing the size of the shaft adjacent the head or whenever desiredso as to give suitable flexibility at desired points of the shaft. 1

In Fig. 5 is shown a shaft the same as that of Fig. 3 except that thewall of the tube is thickened at the waist or portion of least diameterso that while flexibllity of the shaft is obtained at that point theclub shaft may be strengthened. The. shaft as shown in it may have otherembodiments without de All of the shafts of Figs. 1 to 5 inclusive,

which are seamless, may be formed by the method and apparatus asdescribed in my application Serial No. 721,965 above referred to and ofWhich the present application is adivision.

A seamless tube 'is superior for forming the shaftsbecause the desiredcharacteristics are more readily imparted to it and it retains thosecharacteristics under all conditions of use so that it is moresatlsfactory, reliable and durable, and especially it is immune frominjury by torsional stresses while permitting desired flexibility.

While the invention has been illustrated in what are considered its bestapplications extending from the handle toward thehead,

said length being of greater diameter at itshandle end than at its otherend and constituting the reater part of the shaft length, a second tu elength between the aforesaid length and 'said head and having itsoutside diameter greater at its head end than at its handle end and athird tube length between said second tube length and the head end ofsaid shaft, said third tube length having a different relationship ofsucceedingo'utside diameters from that of the said. second tube length.

3. A golf club having a head and a shaft comprising a metal tube havinga tube length extending for the greater part of the length of the shaftand beingof less outside diam- I eter at its head end than at its handleend, a

second tube length adjoining the said tube length and having its handleend of less outside diameter than its head end and a third tube lengthbetween the said second tube length and the head-end of-the' shaft, saidthird tube length having adiiferent relationship of succeeding outsidediameters from that of the second tube length, said tube lengths beingcircumferentially continuous. 4. A golf club having a head and a shaftcomprising a metal tube having a waist formed by reversely tapered tubelengths, said tube lengths being circumferentially continuous, and atube length adjoining one of the aforesaid tube-lengthsand having adifferent relationshipof succeeding outside;

diameters from that of its adjacent tapered" tube length. v

5. A golf club having'a head and a shaft comprisinga seamless metal tubehaving a Waist formed by reversely tapered tube lengths and a tubeextension of substantial; length adjoining one of the aforesaid tubelengths and having a different relationship of succeeding outside.diameters from that of its adjacent tapered tube length. In testimonywhereof I have signed this specification this 30th dayof.Qctobe1,,.1925.

LOUIS i1. BRINKMAN.

